The name of the message template. A template name must start with an alphanumeric character and can contain a maximum of 128 characters. The characters can be alphanumeric characters, underscores (_), or hyphens (-). Template names are case sensitive.
The unique identifier for the version of the message template to update, retrieve information about, or delete. To retrieve identifiers and other information for all the versions of a template, use the Template Versions resource.